Q. i had a deep white filling put into a lower molar tooth 8days ago. I had no pain initially but it has now started throbbing and aching to the point where i can feel the pain travelling up to my right ear at times. It is a deep filling and very close to the nerve and so im worried im going to have to go back and have root canal only one week after having the initial, expensive filling done. Is there another possibility for what could be causing this feeling and can root canal be avoided?,